Efeitos da B-mananase sobre o desempenho e características de carcaça de suínos em terminação

Abstract

This work aimed to verify the effect of the use of β-mannanase enzyme as additive in feed for finishing pigs on performance and carcass traits. The experiment was carried out at the Granja Araújo, located in Gorutuba Project in Nova Porteirinha, Minas Gerais. We used 32 hybrid pigs, barrows and gilts with an average initial weight of 73.75 ± 7.11 kg, divided into experimental design of randomized blocks, with 4 blocks, composed of 4 treatments and 4 replications, totaling 16 experimental units (pens). The treatments were: T1 - Positive-control (basal diet); T2 - Negative-control reducing energy level (- 100 kcal /ME); T3 - Basal diet + 0.05% β-mananase; T4- Basal diet + 0.05% β-mananase with nutritional appreciation (100 kcal/ME). For average daily gain (ADG) there was no significant difference (P> 0.05) between T1 and T3; similarly, significant difference was not observed (P> 0.05) between T2 and T; but both differed significantly (P <0.05) of T1 and T3, which showed the highest mean. For this study the T2 (negative-control) had the worst feed:gain ratio (F:G), differing from the others that have had no significant difference. Significant difference was not observed (P>0.05) for carcass characteristics, carcass yield (CY) and carcass length (CL). The inclusion of β-mannanase did not significantly alter the performance and carcass characteristics of animals.